programming in c# 70 483 [May 2021]

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Q51. - (Topic 2)

You are creating a class library that will be used in a web application.

You need to ensure that the class library assembly is strongly named.

What should you do?

A. Use the gacutil.exe command-line tool.

B. Use the xsd.exe command-line tool.

C. Use the aspnet_regiis.exe command-line tool.

D. Use assembly attributes.

Answer: D

Explanation: The Windows Software Development Kit (SDK) provides several ways to sign an assembly with a strong name:

* Using the Assembly Linker (Al.exe) provided by the Windows SDK.

* Using assembly attributes to insert the strong name information in your code. You can use either the AssemblyKeyFileAttribute or the AssemblyKeyNameAttribute, depending on where the key file to be used is located.

* Using compiler options such /keyfile or /delaysign in C# and Visual Basic, or the

/KEYFILE or /DELAYSIGN linker option in C++. (For information on delay signing, see

Delay Signing an Assembly.)

Note:

* A strong name consists of the assembly's identity—its simple text name, version number, and culture information (if provided)—plus a public key and a digital signature. It is generated from an assembly file (the file that contains the assembly manifest, which in turn contains the names and hashes of all the files that make up the assembly), using the corresponding private key. Microsoft. Visual Studio. .NET and other development tools provided in the .NET Framework SDK can assign strong names to an assembly.

Assemblies with the same strong name are expected to be identical.

Q52. - (Topic 2)

You are developing an application that includes methods named ConvertAmount and TransferFunds.

You need to ensure that the precision and range of the value in the amount variable is not lost when the TransferFunds() method is called.

Which code segment should you use?

A. Option A

B. Option B

C. Option C

D. Option D

Answer: A

Explanation: The double keyword signifies a simple type that stores 64-bit floating-point values.

The float keyword signifies a simple type that stores 32-bit floating-point values.

Reference: double (C# Reference)

Q53. - (Topic 2)

You are modifying an existing application.

The application includes a Loan class and a Customer class. The following code segment defines the classes.

You populate a collection named customer-Collection with Customer and Loan objects by using the following code segment:

You create a largeCustomerLoans collection to store the Loan objects by using the following code segment:

Collection<Loan> largeCustomerLoans = new Collection<Loan>();

All loans with an Amount value greater than or equal to 4000 must be tracked.

You need to populate the largeCustomerLoans collection with Loan objects.

Which code segment should you use?

A. Option A

B. Option B

C. Option C

D. Option D

Answer: D

Explanation: Must add to the largeCustomerLoans collection, not the customerLoanCollection.

We iterate through each customer in customerCollection and check each loan belonging to this customer.

Q54. DRAG DROP - (Topic 1)

You are developing an application that includes a class named Customer.

The application will output the Customer class as a structured XML document by using the following code segment:

You need to ensure that the Customer class will serialize to XML.

How should you complete the relevant code? (To answer, drag the appropriate code segments to the correct locations in the answer area. Each code segment may be used once, more than once, or not at all. You may need to drag the split bar between panes or scroll to view content.)

Answer:

Q55. DRAG DROP - (Topic 1)

You are creating a class named Data that includes a dictionary object named _data.

You need to allow the garbage collection process to collect the references of the _data object.

Answer:

Q56. HOTSPOT - (Topic 1)

You are developing an application in C#.

The application will display the temperature and the time at which the temperature was recorded. You have the following method (line numbers are included for reference only):

You need to ensure that the message displayed in the lblMessage object shows the time formatted according to the following requirements:

The time must be formatted as hour:minute AM/PM, for example 2:00 PM.

The date must be formatted as month/day/year, for example 04/21/2013.

The temperature must be formatted to have two decimal places, for example 23-

45.

Which code should you insert at line 04? (To answer, select the appropriate options in the answer area.)

Answer:

Q57. - (Topic 1)

You are developing an application by using C#. You provide a public key to the

development team during development.

You need to specify that the assembly is not fully signed when it is built.

Which two assembly attributes should you include in the source code? (Each correct

answer presents part of the solution. Choose two.)

A. AssemblyFlagsAttribute

B. AssemblyKeyFileAttribute

C. AssemblyConfigurationAttribute

D. AssemblyDelaySignAttribute

Answer: B,D

Q58. - (Topic 2)

You are debugging a 64-bit C# application.

Users report System.OutOfMemoryException exceptions. The system is attempting to use arrays larger than 2 GB in size.

You need to ensure that the application can use arrays larger than 2 GB.

What should you do?

A. Add the /3GB switch to the boot.ini file for the operating system.

B. Set the IMAGE_FILE_LARGE_ADDRESS_AWARE flag in the image header for the application executable file.

C. Set the value of the gcAllowVeryLargeObjects property to true in the application configuration file.

D. Set the value of the user-mode virtual address space setting for the operating system to MAX.

Answer: C

Q59. DRAG DROP - (Topic 2)

You are developing a C# application. The application includes a class named Rate. The following code segment implements the Rate class:

You define a collection of rates named rateCollection by using the following code segment:

Collection<Rate> rateCollection = new Collection<Rate>() ;

The application receives an XML file that contains rate information in the following format:

You need to parse the XML file and populate the rateCollection collection with Rate objects.

Answer:

Q60. - (Topic 1)

You are developing an application that uses the Microsoft ADO.NET Entity Framework to retrieve order information from a Microsoft SQL Server database. The application includes the following code. (Line numbers are included for reference only.)

The application must meet the following requirements:

. Return only orders that have an OrderDate value other than null.

. Return only orders that were placed in the year specified in the OrderDate property or in a later year.

You need to ensure that the application meets the requirements.

Which code segment should you insert at line 08?

A. Where order.OrderDate.Value != null && order.OrderDate.Value.Year > = year

B. Where order.OrderDate.Value = = null && order.OrderDate.Value.Year = = year

C. Where order.OrderDate.HasValue && order.OrderDate.Value.Year = = year

D. Where order.OrderDate.Value.Year = = year

Answer: A

Explanation: *For the requirement to use an OrderDate value other than null use: OrderDate.Value != null

*For the requirement to use an OrderDate value for this year or a later year use: OrderDate.Value>= year

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